2135569 has 4 divisors (see below), whose sum is σ = 2142244. Its totient is φ = 2128896.

The previous prime is 2135563. The next prime is 2135597. The reversal of 2135569 is 9655312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 659344 + 1476225 = 812^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135569 - 2⁵ = 2135537 is a prime.

It is a super-2 number, since 2×2135569² = 9121309907522, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 2135569.

It is not an unprimeable number, because it can be changed into a prime (2135563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2832 + ... + 3505.

It is an arithmetic number, because the mean of its divisors is an integer number (535561).

2^2135569 is an apocalyptic number.

It is an amenable number.

2135569 is a deficient number, since it is larger than the sum of its proper divisors (6675).

2135569 is an equidigital number, since it uses as much as digits as its factorization.

2135569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674.

The product of its digits is 8100, while the sum is 31.

The square root of 2135569 is about 1461.3586144407. The cubic root of 2135569 is about 128.7768712569.

It can be divided in two parts, 2135 and 569, that added together give a square (2704 = 52²).

The spelling of 2135569 in words is "two million, one hundred thirty-five thousand, five hundred sixty-nine".